Speedo Youth Girls Boom Logo Thinstrap Muscleback One Piece Swimsuit

A celebration of Speedo branding, this swimsuit features our iconic Speedo logo print in contrasting colourways. Ideal for children's lessons, training and fun sessions in the water, the Muscleback style features thin, supportive straps for total flexibility during their swim. Quick-drying and stretchy to keep active kids comfortable, it's made from Endurance10 fabric which is designed to keep its shape.


Muscleback is great for longer swim sessions with the design allowing for full range of motion

Higher chlorine resistance than standard swimwear fabric - fits like new for longer with CREORA HighClo

Shape retention - fabric stretches so you can enjoy your swim without feeling restricted


Size chart

GB 4-5yrs/22 5-6yrs/24 7-8yrs/26 9-10yrs/28 11-12yrs/30 13-14yrs/32 15-16yrs/34
Height cm* 104 116 128 140 152 164 176
Chest/Bust cm* 54.5 60 65.5 71 78 84 91
Waist cm** 53.5 58 61.5 66 71 76 81
Hip cm** 60 65 70 75 81.5 88 94.5