There’s a reason those polyester tops and bottoms smell so funky after a workout: Recent research shows that synthetic fabrics are a breeding ground for malodorous bacteria.  To sweat without sticking up the gym, look for these fabrics: COTTON: It absorbs odors and discourages the growth of smelly bacteria. RAYON MADE FROM BAMBOO: When sweat lingers on a fabric’s surface, odorous bacteria soon follow. Bamboo can absorb up to 3 times its weight in water. You do the math. MERINO WOOL: It absorbs odor molecules, so you’re less likely to smell them. HEMP: Antimicrobial properties of this durable standby may help keep gear funk-free. Check out these new, odor-resistant workout picks: Soft Yet Shapely: Tasc Performance Hex Racer ($30, tascperformance.com)Media Platforms Design Team Photo by Stuart Tyson No-Smell Support: Beckons Strength Reversible Sports Bra ($38, beckonsyogaclothing.com) Photo by Stuart Tyson Odor-Free Feet: Icebreaker Women’s Multisport Ultra Lite Micro Socks ($15, icebreaker.com) Photo by Stuart Tyson Fresh and Stretchy: Prana Cecilia Knicker ($65, prana.com) Photo by Stuart Tyson MORE: 3 Treadmill Workouts That Beat Boredom And Blast Calories