Stone Sacks

The Basics

Hacky Sack noun

The small, soft, sand-filled ball you keep in the air with your feet — and the game itself. "Hacky Sack" started as a brand name (Wham-O) but everyone now uses it for any footbag. Also called: footbag, kick sack, footsack.

Footbag noun

The "official" name for both the ball and the sport. Serious players and competitions say "footbag"; everyday people say "hacky sack." Same thing.

Hack noun / verb

A single rally where a group keeps the sack up without it hitting the ground. "We got a 50-hack." Also just means to play: "wanna hack?"

Circle noun

The classic way to play — a group stands in a ring and passes the sack around using only feet, knees, and chest. No hands, and ideally nobody's the reason it drops.

Hands-Free Rule rule

The one law of hacky sack: no hands or arms (except to serve). Feet, knees, thighs, chest, and head are all fair game.

Moves & Stalls

Kick move

Any contact that sends the sack back up. The three starters: inside kick, outside kick, and toe kick.

Stall move

Catching the sack and holding it dead still on your body for a beat before kicking again — without it bouncing off. The foundation of every trick.

Toe Stall move · beginner

Balancing the sack on the top of your toes, foot flat. Usually the first stall people learn.

Inside / Outside Stall move · beginner

Catching and holding the sack on the inside or outside surface of your foot. A soft, relaxed ankle is the secret.

Clipper move · intermediate

A kick or stall made with your contact foot crossed behind your standing leg. Looks way harder than it is once it clicks. Also called: jester, chester.

Around the World move · intermediate

You toss the sack up and circle your whole leg around it in the air before catching it again. The first "whoa" trick most people learn.

Set move

A controlled little pop that lifts the sack to the perfect height for your next trick. Good sets make hard tricks easy.

Freestyle Lingo

Freestyle noun

The trick-based side of footbag — stringing stalls, kicks, and spins into combos, often to music. This is the stuff going viral.

Delay concept

Holding the sack in a stall slightly longer for control and style. A "toe delay" is just a smooth, held toe stall.

Dexterity (Dex) concept

Any move where your leg circles around the sack — like Around the World. "Xdex" means circling the other (harder) direction.

Add concept

A unit of difficulty. Each extra spin, cross, or circle you pack into one move is an "add." More adds = a gnarlier trick.

Combo / String noun

Several tricks chained together without the sack dropping. The whole point of freestyle.

Gear

Sand Sack gear

A footbag filled with sand — like ours. Heavier, lands flat, barely bounces — easiest to stall on and best for freestyle. "Real sand-weight, made to rip." 🛸

Pellet Sack gear

Filled with plastic pellets. Lighter and bouncier than sand — better for fast group circles than for tricks.

Panels gear

The number of fabric pieces sewn into the sack. More panels = rounder shape and better control.

Weight gear

Most sacks run 40–70g. Heavier feels more controlled underfoot; lighter is livelier in a circle. Freestylers usually go heavier.