While wearing these gloves, climbing and swimming don't cost you extra movement, and you gain a +5 bonus to Strength (Athletics) checks made to climb or swim.
Gloves of Swimming and Climbing in the 2024 rules
The 2024 Dungeon Master’s Guide revised the magic items, and the SRD 5.2 carries the new text. What changed:
Same rarity and attunement; the text is reworded for the 2024 rules glossary.
Type
Wondrous Item
Rarity
Uncommon
Attunement
Required
While wearing these gloves, you have a Climb Speed and a Swim Speed equal to your Speed, and you gain a +5 bonus to Strength (Athletics) checks made to climb or swim.