12mm of squishy neoprene available in

Ruk sports

or

Hydro sports brand

or

Venom

it put a protection between you and the cold car park or  the grass, river banks or standing on sharp things. It also   protects your gear so you no longer have to stand on  on your spray deck or shoes which   would just ruin them.

This mat has been used for a variety of   other purposes including a mechanics kneeling mat, bathroom mat,   door mat gardening kneeling mat canoeing kneeling mat

The measurement's are

approx. 12mm thick

approx. 52cm long

approx. 40cm wide.