Topeak Wedge Dry Bag Small. Protect your gear while riding in wet conditions with the Topeak Wedge Dry Bag seat pack. This small sized seat pack is made from a tough, waterproof material which is sonically welded and seam sealed to provide the ultimate protection in nasty weather. Additionally, a roll closure keeps water and mud out while the contents remain dry. The seat pack conveniently mounts to saddle rails and seat post with a nylon strap system and features reflective accents plus a mount for a tail light to keep you visible in inclement andor dark conditions.