Is a kids' rash vest warm enough to replace a wetsuit?

No. A standard rash vest is a thin stretch layer for UV coverage and reduced rubbing; it provides very little thermal insulation. In cold water, use an age-appropriate wetsuit or other thermal swim product. A rash vest can be worn beneath a wetsuit, but the combination must remain comfortable around the neck and underarms.

Should I buy a child's rash vest larger so it lasts another summer?

Allow normal movement and some growth, but avoid a size that balloons in water or exposes large gaps at the neck and waist. Excess fabric can rub and reduce comfort during swimming. Use chest, height and torso measurements rather than age alone, as children of the same age vary considerably.

When is a toddler UV suit better than a separate rash top?

A one-piece or suit gives continuous torso coverage and reduces the chance of the top riding up during sand play. It is useful for younger children but can make nappy or toilet changes slower. A separate top is more flexible and easier to replace independently as the child grows.

Do all children's rash vests provide the same sun protection?

No. Look for a stated UPF rating and keep the garment in good condition. Stretching, thinning, damage and an excessively loose fit can affect coverage. The vest protects only covered skin, so combine it with sunscreen, a hat, shade and sensible timing as recommended for children.

Can the same rash vest be used in a chlorinated pool and the sea?

Usually, but rinse it promptly after both uses. Chlorine can degrade stretch fibres and salt can remain abrasive if left to dry in the fabric. Check the brand's care label, especially for printed or fashion-led styles. Rotate two vests if swimming frequently so each can dry fully between sessions.