Waterproof roll top closure.Features:Phyzibility 360 degree reflective detailing3 x air mesh padded panels for greater air circulation and comfortWater resistant zipped external pocketWipe clean, waterproof construction with welded seamsReflective webbing loop for tail light attachmentAdjustable chest and waist strapLonger length straps for improved comfort when ridingCarry handleApprox. Size when filled: (hxwxd) 50x20x23cm