Two sizes cover day trips and larger kit loads

The range consists of 15-litre and 25-litre bags, giving users a choice between a compact day-bag format and additional space for clothing, spare layers or other equipment. Spinlock positions both versions as lightweight, versatile storage for wet marine environments.

Capacity matters on small boats because locker space is limited and loose equipment can quickly clutter cockpits and cabins. A smaller bag is easier to stow, while the larger version may reduce the need to carry several separate containers.

A one-way valve reduces packed volume

The distinguishing feature is a one-way release valve that allows trapped air to be pushed out after the roll-top has been closed. Removing excess air lets soft contents compress more tightly, reducing the space the bag occupies in a locker or equipment bag.

The valve does not turn the bag into a vacuum storage system and owners should avoid forcing sharp or rigid items against the fabric. The greatest benefit is likely with clothing, towels and other flexible gear that naturally traps air when packed.

Roll-top closure provides the waterproof barrier

Spinlock uses a conventional roll-top closure to seal the opening, a familiar arrangement on marine dry bags because it avoids zips and creates a simple folded barrier against spray and brief immersion. Correct rolling and fastening are essential to maintain that protection.

Waterproof storage is particularly useful on open RIBs, dinghies, tenders and small dayboats where lockers may not remain completely dry in rain or spray. Electronics and critical safety items should still receive additional protection when complete water exclusion is essential.

Compact storage has practical value on smaller craft

Dry bags are simple equipment, but their usefulness increases as boats get smaller and every locker has to work harder. Compressing soft contents can free space for safety gear, food, tools and other equipment that cannot easily be squeezed into a smaller volume.

Owners should choose bag sizes around the lockers and access openings on their own boat rather than only considering nominal litres. A bag that fits through a hatch easily and can be removed quickly is generally more useful than a larger one that becomes difficult to handle.

Official sources: www.spinlock.co.uk.