Classic thermolactyl cleverly designed interlocking stitches which create tiny air pockets which trap air locking cold out and heat in flexible and hardwearing without side seams interlock long pants available in a choice of 2 lengths with ankle cuff and fly front machine washable85 thermolactyl chlorofibre 15 acrylic outside leg length standard 1025cm 40inch approx outside leg length extra long 1115cm 44inch appro