Extreme Pie's sale is now up to 70% off and if you enter SALE10 at the checkout, you receive 10% off.
A lot of their snow sports stuff is very cheap e.g. 'Santa Cruz Atlas Tech Snow Pant' which were £105 and are now £37.80.
Most of the swimware is significantly discounted too.
Loads of T-shirts and hoodies are also very cheap.