Bikini briefs by Playful Promises, Stretch swim fabric, Low-rise hipster styling, Palm print, Strappy sides, Flattering brief cut, Hand wash, 86% Polyester, 14% Elastane, Our model wears a UK 8/EU 36/US 4. ABOUT PLAYFUL PROMISES London lingerie label Playful Promises, mixes flirty detailing with directional design. Corsets, bras and briefs come in luscious tulle and satin finishes as bandeau bikinis and cut-out swimsuits see retro prints and ruffle trims add to Playful Promises full collection of intimates.