Shedding your winter coat means baring your winter skin. Luckily Spa Week — your chance to score $50 treatments at spas across the city (and country) — is taking place April 11-17, just in time to swap those sweaters for short sleeves.“After this year’s grueling winter, the skin on our face and body needs some damage control,” says Trena Ross, spa director at L’Institut Sothys in Manhattan. “The elements have left our skin dry, dehydrated and dull — and it is necessary to look for treatments that will help bring radiance and vitality and restore health to the skin to return that ‘spring’ glow.” Ross suggests looking for treatments that exfoliate — full-body treatments should include scrubs or polishes to do the trick, and facials should nourish the skin as well as exfoliate it. Spring is also when clients look for remedies to improve that burgeoning beach body, she says. “Many slimming treatments designed to improve the appearance of cellulite and refine the body contours require a succession of treatments in order to see the desired results,” Ross explains. “Spring is the perfect time to start this regimen in order to get bikini-ready for the summer.” Spa Week steals to book in the boroughsHere’s a sample of local Spa Week offers. For the full list of participating spas and the treatments you can receive for $50 next week, visit www.spaweek.com.» Pineapple and Mango Spring FacialL’Institut Sothys New York37 W. 57th St.212-688-9400www.sothys.com» Springtime Glow Synergy FacialSmooth Synergy686 Lexington Ave., Suite 3N212-397-0111www.smoothsynergy.com» Anti-Cellulite Detox Slimming TreatmentSeason Spa165 Hester St.212-966-7416www.seasonspa-nyc.com» Spring Ready Package: Includes Brazilian, Eyebrow, Lip and Underarm WaxI SPA28-27 Steinway St., Astoria718-777-8886www.ispa-ny.com» Organic Eminence Facial with Customized MaskMagnolia Beauty Spa124 Bedford Ave., Brooklyn718-599-5780www.magnoliabeautyspa.com»Eminence Strawberry Sweet Cheeks Peel Treatment with Strawberry and Marshmallow Cocktail, Vitamin C and Hyaluronic AcidVenelle Spa62 Seventh Ave., Brooklyn,718-989-9855www.venellesalonandspa.com