The sea to summit mat repair kit is a set of self adhesive patches and one way valve flaps that have been specially formulated to create a failsafe bond to sea to summit sleeping mat surface fabric ensuring that you will get a good night s sleep even if your mat should suddenly develop a puncture while you are in the middle of enjoying your backpacking adventure kit contains 4 x 3cm circular grey patches 4 x 4cm square grey patches 2 x replacement sillicon one way valve flaps 1 x instruc