18L

Capacity

IPX7

Water resistance

1,2L

Hydration bladder included

420 × 235 × 190mm

Dimensions

Model

Product code

BTZB18TBK

Features

EAN

6978601700503

Type

Expansion bag to mount on the side case

Series

LOBOO ALPS

Dimensions

Capacity

18 liters

Dimensions

420 × 235 × 190

Materials and construction

Material

TPU, nylon and polyester

Features

Water resistance

IPX7

Modular system

MOLLE

Weights

Weight

Not stated by the manufacturer

Features

Color

Nero

Assembly

Fastening

Four straps with quick-release buckles

Features

Content

Bag, hydration bladder with tube, threadlocker

Specifications stated by the manufacturer LOBOO. If in doubt about compatibility with your model, please contact us before purchasing.

All you need to know before ordering

Technical specifications, equipment, delivery, and warranty: find every detail, verified against official LOBOO documentation, below.

Description 18 L IPX7 Waterproof Motorcycle Bag for Side Case or Top Case | hydration bladder included, can also be carried as a backpack — ALPS

The suitcases are full, and there is still no room for dry clothes. The ALPS Side Case Top Bag is designed exactly for this: eighteen liters that sit on top of the side case lid, the top case, or the rear luggage rack, and are secured with four quick-release straps. No brackets, no drilling, no modifications to the motorcycle.

The body is made of laminated TPU with a watertight zipper, and the manufacturer states an IPX7 rating, printed on the bag's label: you can put dry clothes inside and find them still dry after hours of rain. A vent valve on the side lets air out after closing, so the bag compresses and stays firmly under the straps instead of inflating while riding.

The package also includes a 1.2-liter hydration bladder with a hose, which fits in a dedicated top pocket: drink during a stop without opening the luggage. Inside, a separate pocket keeps wet garments away from the rest; outside, the MOLLE webbing accommodates tool holders and accessories, while the reflective inserts work exactly where they are needed, at the highest and most visible point on the back of the motorcycle.

When you get off, you don't have to transfer anything: use the shoulder strap, handle, or backpack straps to carry it with you to your room.

Why choose it
  • IPX7 even in a small size:the same rating as the ALPS 46L, covers temporary immersion.
  • Integrated MOLLE system:attach tool holders, water bottles, and pouches without piercing the bag.
  • High-resistance TPU:wear-resistant, with a reinforced structure for adventure use.
  • 18 L:the right volume for everyday use or to complete an existing setup.
  • Universal mounting:adapts to different motorcycle configurations.
Who is it recommended for

It is designed as an add-on module. It is useful if:

  • You already have a rear bag and need extra space without changing your setup
  • You use your motorcycle daily and 18L is enough for your usual load
  • You want to be able to attach MOLLE accessories and reconfigure your load for travel
  • You transport water-sensitive items and don't want to go below IPX7

For long trips, consider the ALPS 46L or the Wanderer 50L as your main bag.

Documents and manufacturer

Use and notes

  • Degree of protection declared by the manufacturer: IPX7. Covers temporary immersion, not prolonged use in water.
  • Check that the waterproof zipper is fully closed before setting off.
  • The load must not cover the license plate and rear lights, nor protrude beyond the limits established by the Highway Code.
  • MOLLE accessories are not included.

Key Specifications

  • Material: TPU+Nylon+Hypalon+Aluminum

  • Water resistance: Waterproof IPX6

How does it work, in detail?

Eighteen more liters without touching the setup

Eighteen more liters without touching the setup

When your luggage is full and you need space for that last layer of clothing, this bag sits on top of the side case or top case lid and fastens with the straps. It requires no brackets, doesn't modify the motorcycle, and can be removed in just a few seconds when not needed.

Laminated TPU fabric and waterproof zipper

Laminated TPU fabric and waterproof zipper

LOBOO specifies a laminated TPU fabric that remains flexible even at low temperatures, combined with a waterproof zipper. This combination keeps the contents dry and lets you open and close it quickly without struggling with roll-top closures and buckles.

Declared IPX7 waterproofing

Declared IPX7 waterproofing

The IPX7 rating is printed on the bag’s label and is the specification declared by the manufacturer. It means protection against temporary immersion, so it goes well beyond a rainstorm on the motorway. That’s why you can put your dry change of clothes in it without plastic bags.

The fabric can withstand up to the stated 200 kg.

The fabric can withstand up to the stated 200 kg.

LOBOO states that the fabric is resistant to abrasion and tearing, with a load capacity of up to 200 kg. For a bag that travels strapped onto a suitcase, exposed to friction and vibrations over thousands of kilometers, that is the number that matters more than aesthetics.

1.2-liter hydration bladder, included in the package

1.2-liter hydration bladder, included in the package

The package includes a 1.2-liter hydration bladder with a tube that fits into the dedicated upper pocket. It is not an accessory to purchase separately: it is listed in the manual's parts list, and the tube exits through the designated opening.

Drink without stopping and without taking off your gloves

Drink without stopping and without taking off your gloves

With the bag in place, the tube reaches shoulder height, so you can drink while stopped at a traffic light or with the motorcycle stationary without opening your luggage. On long summer rides, it makes the difference between drinking occasionally and drinking when you need to.

MOLLE straps for whatever you want to add

MOLLE straps for whatever you want to add

Along the sides are MOLLE webbing straps, the standard used for tactical bags. Attach a tool pouch, a water bottle, or an additional pocket without drilling or sewing anything onto the bag.

Convenient outer pocket and vent valve

Convenient outer pocket and vent valve

On the outside, there’s a pocket for things you need often, spare gloves, or documents: the manufacturer states that it is NOT waterproof, so delicate items should go inside. On the side, you’ll find the valve that lets air out after you close the bag.

Reflective on multiple sides, for those following you

Reflective on multiple sides, for those following you

The reflective inserts are distributed across multiple sides of the bag. Mounted high above the luggage, the bag is the most visible part of the rear of the motorcycle: that is where the reflector works best, at night and in traffic.

A separate pocket for wet items

A separate pocket for wet items

Inside, there's a dedicated pocket that separates wet clothes from dry ones. It's useful when returning from the rain or after stopping at the beach, when the alternative is putting everything together and ending up with damp clothes to change into at the end of the day.

Shoulder strap, handle, or backpack straps: get off and take it with you

Shoulder strap, handle, or backpack straps: get off and take it with you

The same bag can be worn crossbody, carried by hand, or worn as a backpack using the shoulder straps. When you arrive at the hotel, unclip the straps and go up to your room with your luggage on your back, without transferring anything to another bag.

The figures, as reported by the manufacturer

The figures, as reported by the manufacturer

420 × 235 × 190 mm for 18 liters, TPU, nylon, and polyester materials, black color. This is the official specifications sheet reproduced without additions: LOBOO does not state the weight, and in fact, among the specifications, you will find it listed as not declared rather than estimated.

How to fix it: first method

How to fix it: first method

LOBOO quick-release straps anchor to the four points on the luggage rack or lid, then thread through the bag buckles and are tightened. The straps measure 12 to 49 cm and include two 24 cm elastic extensions.

How to fasten it: second method

How to fasten it: second method

The manual shows a second arrangement of the same straps, with the webbing passing over the bag instead of along the sides. The grip changes depending on the design of the support surface: choose the one that leaves less slack on your luggage rack.

Straps, stickers, and keychains: what LOBOO shows

Straps, stickers, and keychains: what LOBOO shows

The manufacturer lists four quick-release straps, a sticker, and a keychain among the promotional accessories. However, the manual's parts list mentions only a bag, hydration bladder, and threadlocker: before ordering, write to us and we will confirm with the distributor what the incoming package contains.

How does it fit on a motorcycle that’s already loaded?

How does it fit on a motorcycle that’s already loaded?

In the manufacturer's images, the bag is placed on top of the side cases and next to the top case of a fully equipped maxi enduro. It remains low and narrow within the motorcycle's profile, without extending beyond the width of the cases.

In the top case, on the scooter, over your shoulder

In the top case, on the scooter, over your shoulder

You don't need a touring motorcycle: the images also show it on the rear luggage rack of a large-wheel scooter. Wherever there's a flat surface and four points to which you can fasten the straps, the bag fits.

Who is LOBOO

Who is LOBOO

For over ten years, LOBOO has designed travel accessories for motorcycles and states that it has technical collaborations with several manufacturers, including KTM, Honda, CFMOTO, VOGE, and KOVE. This is why its products are developed from real vehicle data rather than as universal adaptations.

FAQs

For more information, please see our FAQ.

Where exactly is this bag mounted?

The official name of the LOBOO is ALPS Side Case Top Bag: it is designed to rest on top of the lid of a side case or top case, and the manufacturer's images also show it on the rear luggage rack of a scooter. It requires a supporting surface and four points to which the straps can be secured.

Do you need a dedicated frame or mounting plate to use it?

No. The bag attaches only with its own straps and does not require brackets, plates, or drilling. It does not modify the motorcycle in any way and can be removed in just a few seconds when not needed.

Are the straps to secure it included in the package?

On this point, the LOBOO documentation is not consistent, and we prefer to say so: the product page presents four quick-release straps among the promotional accessories, while the manual’s parts list mentions only a bag, a hydration bladder, and threadlocker. Write to us before ordering, and we’ll confirm with the distributor what the incoming package contains.

What does the package contain?

The assembly manual lists three items: the bag, a 1.2-liter hydration bladder with tube, and threadlocker. The commercial panel adds quick-release straps, adhesive, and a keychain as promotional accessories.

Is it truly waterproof or merely water-resistant?

LOBOO declares an IPX7 rating, which is printed on the label sewn onto the bag. This corresponds to protection against temporary immersion, so it more than covers heavy rain and washing. The body is made of laminated TPU with a waterproof zipper.

Is the outer pocket waterproof too?

No, and the manufacturer itself states that the external pocket is intended for frequently used items and is not waterproof. Documents, electronics, and dry clothing should go in the main compartment.

What is the valve on the side used for?

It is a vent valve. After closing the bag, open it, compress it with your hands to let the air out, and close it again by turning the cap: the bag becomes more compact and stays more secure under the straps without bulging while riding.

Is the hydration bladder included, and how much does it hold?

Yes, it is listed in the manual’s parts list and has a capacity of 1.2 liters, complete with a tube. It fits into the dedicated upper pocket, and the tube comes out through the designated opening, so you can drink without opening the luggage.

How much does the bag weigh?

LOBOO does not state the weight of this item, either in the manual or on the specifications sheet. We prefer to mention this rather than publish an estimate: if you need the exact figure to calculate the load, contact us and we will ask the distributor.

What are the external dimensions?

420 × 235 × 190 mm for a capacity of 18 liters, according to the LOBOO specification sheet. These are the dimensions to compare with your suitcase lid or luggage rack platform before ordering.

Can it be carried as a backpack when I get off the motorcycle?

Yes. The manufacturer presents it as a three-in-one bag: crossbody, handheld with the handle, or backpack-style with the shoulder straps. It is especially convenient upon arrival, when you carry everything you need for the night without having to transfer anything.

Is it also suitable for a high-wheel scooter?

Yes: among the official images, there is an installation on the rear luggage rack of a scooter. The condition is always the same: a stable support surface and four points to which to anchor the straps.

Can I attach other accessories to it?

Yes, the MOLLE webbing runs along the sides, the standard used for tactical bags. You can attach tool pouches, bottle holders, or compatible MOLLE add-on pockets without modifying the bag.

Does the aluminum suitcase lid get damaged?

The base is made of smooth TPU and is secured with webbing straps, with no metal parts in contact. As with any luggage strapped onto a painted or anodized suitcase, it is still advisable to check that no sand or gravel remains between the two, as that is what actually marks the surface.

Didn't find the answer you were looking for?

Do not hesitate to contact us

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