Kids' UV Swimwear Compared: One Piece, Long Rash Shirt or Short Rash Shirt?

BANZ UPF 50+ kids swimwear range including one piece swimsuit, long rash shirt, and short rash shirt in bright summer prints

Summer is here, and keeping little ones protected from the sun without the sunscreen battle is every parent's dream. Our Clothing collection features a brilliant trio of BANZ® UPF 50+ kids' swimwear — all clinically tested, chlorine-resistant, and built to last the whole season. But which style is right for your child? We break them down so you can choose with confidence.


1. Swimwear – One Piece Swimsuits

From £14.99

BANZ UPF 50+ one piece swimsuit for infants and toddlers in Tropicana print, front view

The One Piece Swimsuit is the ultimate all-in-one solution for babies and toddlers. With ¾-length sleeves for maximum coverage, a front zip for quick changes, and a clever inseam zip for nappy access, it's designed with parents firmly in mind. Pop them in, zip up, and they're protected for the day — no reapplication needed.

BANZ one piece UV swimsuit in Dolphin print for toddlers, front view

Best for: Infants and toddlers, pool days, splash parks, maximum sun coverage.

Key features: UPF 50+, inseam nappy zip, front zip, 82% Polyamide / 18% Spandex, machine washable, chlorine & fade resistant.


2. Swimwear – Long Rash Shirts

From £12.40

BANZ long sleeve rash guard shirt for kids in Dolphin print, front view

The Long Rash Shirt gives older kids the freedom to mix and match — pair it with their favourite swim bottoms for a personalised look. Long sleeves mean arms stay covered all day, making it ideal for beach days, water parks, and theme park splash pads. It's the versatile option that grows with your child's sense of style.

BANZ long sleeve rash guard in Little Monsters print for children, front view

Best for: Older toddlers and kids, beach and water park days, mix-and-match styling.

Key features: UPF 50+, long sleeves, cut for maximum comfort, machine washable, chlorine & fade resistant.


3. Swimwear – Short Rash Shirts

From £11.80

BANZ short sleeve rash guard shirt for kids in Sea Life print, front view

The Short Rash Shirt is the most budget-friendly option and perfect for warmer days when full sleeve coverage isn't needed. Cut longer than a standard tee for extra torso protection, it pairs easily with any swim bottoms. Great for kids who prefer a bit more freedom of movement in the water.

BANZ short sleeve rash guard in Tropicana print for children, front view

Best for: Warmer days, active swimmers, budget-conscious shoppers.

Key features: UPF 50+, short sleeves, longer cut for torso coverage, machine washable, chlorine & fade resistant.


Side-by-Side Comparison

Feature One Piece Swimsuit Long Rash Shirt Short Rash Shirt
Price from £14.99 £12.40 £11.80
Sun Coverage Maximum (full body) High (arms + torso) Good (torso + upper arms)
UPF Rating UPF 50+ UPF 50+ UPF 50+
Best Age Infants & toddlers Toddlers & older kids All ages
Mix & Match No (all-in-one) Yes Yes
Nappy Access ✅ Inseam zip
Machine Washable

Which Should You Choose?

If your little one is still in nappies, the One Piece Swimsuit is a no-brainer — the inseam zip alone is worth its weight in gold on a busy pool day. For older kids who want to express their style, the Long Rash Shirt offers the best coverage with the flexibility to mix and match. And if you're after the most affordable entry point or your child runs warm, the Short Rash Shirt delivers solid UPF 50+ protection at the best price.

All three are built to BANZ® standards — chemical-free, chlorine-resistant, and guaranteed to keep their shape all season long. Browse the full range in our Clothing collection.

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