Our BDlab Tank is a seamless, light-compression supportive top with built-in bra suitable for cup sizes A–C. Great for yoga, barre, fitness classes, spin classes, running, gym workouts and layering under your cycling jersey or tri top. Engineered using sculpting seamless technology, technical premium yarns  extremely high-grade fabrics. Body mapping garments that sculpt and shape. The result— modern performance apparel with light compression that is supportive, not restrictive. 

• 70% polyester / 30% lycra
• Thin strap, racerback design
• Full length tank
• A-line shape that flares ever so slightly to hip
• Internal shelf bra. This tank has more support for high-impact activities than our standard Betty Designs tri tanks
• Stef is  5'8", 130 lbs, 34B, 27" waist, 36" hips, 29" inseam, 21" thigh and wears size XS
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• XS = 00-2, S = 2-4, M = 4-6, L = 8-10
• We suggest washing your BDlab by hand, in cold water, with gentle detergent, then hang to dry

Need a size consultation? Email customer service at  or click the support tab and send us your height, weight, bra denim size so we can assist.