This Serene travel configuration pairs a single-window mask and USP-250 dry snorkel with UF-21 adjustable fins. It is the custom white-themed package shown in the selector, with a mesh bag offered as an optional extra.
What is included?
The standard configuration includes:
Mask and snorkel features
- TUSA Serene UM-16: The rounded silicone skirt edge, 3D anatomical strap and five-position strap-angle adjustment help you fine-tune the fit.
- Lens layout: Single tempered-glass lens.
- TUSA USP-250 Hyperdry Elite: A float-operated top helps limit water entry. A silicone flex neck and mouthpiece, collection chamber and lower purge valve assist positioning and clearing.
Included fins: TUSA UF-21
A soft pocket, silicone heel strap and flexible travel blade with thrust channels make these compact snorkelling fins.
Technical Specs
| Specification | Details |
|---|---|
| Mask | TUSA Serene UM-16 |
| Lens layout | Single tempered-glass lens |
| Mask fit guide | Small–medium adult fit guide |
| Snorkel | TUSA USP-250 Hyperdry Elite |
| Snorkel top | Dry top |
| Fins | TUSA UF-21 |
| Fin style | Adjustable open heel |
| Fin footwear | Bare feet; no dive boots required |
Mask fit and buying as a gift
Use the mask’s fit profile as a starting guide only. Face width, cheek shape and nose clearance matter more than age or gender. Keep hair clear of the skirt and adjust the strap with light tension. Check that the mouthpiece sits naturally without strong clenching. For a gift, check the recipient’s current fit and foot size where possible, or ask our Hallam team for help before choosing.
TUSA UF-21 size guide
| Fin size | Foot length guide | EU guide |
|---|---|---|
| S | 20–23 cm | 32–39 |
| M | 23–26 cm | 36–42 |
| L | 25–28+ cm | 40–46+ |
These fins are intended for bare feet or suitably fitted thin socks. Check both feet and select from the sizes offered on this pack. A charted size may not be available in every colour. The fin should feel secure without pinching, curled toes or excessive movement; do not choose loose fins just for growing room.
To measure your feet, place paper against a wall, stand with your heel gently against the wall and mark your longest toe. Measure from the wall to the mark in centimetres. Repeat for the other foot and use the longer measurement. Where a model has no foot-length chart, contact us with that measurement and your usual shoe size rather than using another fin model’s chart.
Optional extras
The following items are additional selections and are included only if you choose them:
- TUSA Sport Deluxe Mesh Snorkel Gear Bag – 72cm.
- TUSA TA0801 Freedom Film Anti-Fog For 1-Window Masks.
Anti-fog film is shaped for particular lenses. Check the film’s listed mask compatibility and the supplied fitting instructions before applying it, especially with coated or corrective lenses.
Use, care and storage
A snorkel supplies air only while its opening is above the water. A dry top helps limit water entry but does not provide air underwater or guarantee a dry mouthpiece. Practise fitting and clearing in calm, shallow water before heading out.
Rinse the equipment in fresh water after use, including buckles, straps, snorkel valves and fin pockets. Dry in the shade before storage. Use mask-care products as directed and avoid abrasive cleaners, toothpaste or flame treatments. Inspect the mouthpiece, skirt and straps before the next swim.

















