The topeak dyna wedge saddle pack with strap features moulded construction thats light weatherproof and aerodynamic its perfect for tubes tools and other small items key features elastic polyurethane fibre eva foam 210 denier 420 denier nylon weatherproof version easily mount to saddle rails with adhesive straps and seatpost with rubber strap suitable for most type of saddle rails fits 254 318 mm diameter seatposts small 185 x 6 x 145cm capacity 08l weight 98g