Caltrops in D&D 5e costs 5 cp, weighs 2 lb..
As an action, you can spread a bag of caltrops to cover a square area that is 5 feet on a side.
Any creature that enters the area must succeed on a DC 15 Dexterity saving throw or stop moving this turn and take 1 piercing damage.
Taking this damage reduces the creature's walking speed by 10 feet until the creature regains at least 1 hit point.
A creature moving through the area at half speed doesn't need to make the save.
Frequently Asked Questions
The Caltrops costs 5 cp in D&D 5th Edition.
The Caltrops weighs 2 pounds in D&D 5th Edition.