Weather-resistant, bikepacking/urban-inspired seat pack bag ideal for day-trippers or commuting trunk bag users who dont want to use a rackOceanweave 600D reclaimed fishnet polyester with waterproof polyurethane coating2 rubberized, modular seatpost straps with CamLock, ensure things stay tight, while eliminating potential damage to clothingPolypropylene plates below saddle, ensure ample leg clearance, even if heavily loadedSupplemental rear closure strap system provides additional supportHeavy-duty seat rail buckle and straps, pull up to tightenWater-resistant stitched constructionSeat post10.6x6.3x5.5427 c.i.Black