Through May, take 20% off Merrell clothing when you apply code APPAREL20 at checkout at Merrell.com. Shipping is free. For example, this women's Tough Mudder Top drops from $85 to $54.99 to $43.99 with this code, which is the best price by $41. These have thumb holes and jacquard mesh fabric. Or checkout this Tough Mudder Vest, which drops from $130 to $84.99 to $67.99. This is also the best price online, and it features featherless insulation. Sales tax is charged in most states.