RST Alpha IV jacket worn once as wrong size brought, size 2xl ( see website link for size info). It is the best jacket for when it is wet and/or cold, I also got the full zip matching trousers. Did not buy this jacket from Sportsbike just its replacement as 1st jacket brought from a site with bad return policies, my fault should have read them first! I went for a motorway ride for a two hour ride in pouring rain, got home dry on the inside and nice and toasty warmongering the inside.