Read the booking email before you buy anything for your first barre class: it tells you whether the studio wants grip socks or allows bare feet. If it says grip socks, pack the AMP Shock: a closed no-show with traction under the ball of the foot and heel, 20-30 mmHg graduated compression, and patented arch support for an hour of small pulses. If the email allows bare feet, reach for the Joule Shock, the open sleeve.
The AMP Shock: 20-30 mmHg graduated compression, patented arch support, and a traction build that settles in over a few classes; the barre collection carries the APMA Seal.

Studios differ: some ask for a sock with grip on the sole, some let you go barefoot. The email or the front desk settles it before you spend anything.
The closed no-show, with the grip where a releve puts your weight.
Open at the toe and the heel, so skin meets the floor there.
One size chart covers both picks, and a compression sock is sized snug on purpose.
For the hour of small movements you did not expect to feel in your feet, with traction where you push off.
Shop the AMP Shock
Open-toe and open-heel so your toes and heel still feel the floor, with 20-30 mmHg compression around the arch and ankle. For studios that allow bare feet; if yours asks for grip socks, the AMP Shock is the pair.
Shop the Joule Shock
Before, if the booking email says grip socks; after, if it lets you go barefoot and you want to feel the floor once before deciding. That email carries the whole rule. If it does not mention feet, the front desk will answer in one sentence, and that sentence decides which of the two picks below you need. Arrive without socks at a grip-sock studio and ask the front desk before class whether they sell or lend a pair; then buy the pair you will keep once you know the floor.
If the answer is grip socks, the AMP Shock with traction goes in the bag, because grip on the sole and a held arch are the two things an hour of pulses asks for. If bare feet are allowed and you want support without a sock under your toes, the Joule Shock is the sleeve for that. The barre socks collection covers the choice for the classes after this one.
An hour of standing on the balls of your feet. Releve, plie, and long sets of tiny pulses at the barre load the arch and the front of the foot in a way a first-timer rarely expects, and a wood or laminate floor gives you nothing back. That is why the sock matters more here than in most classes: it is grip on the sole and support around the arch, in the same hour.
The AMP Shock carries both, in a closed no-show.
Grippier than it will feel in a month. On the AMP Shock the traction sits at the ball of the foot and the heel. It arrives sticky, breaks in over a few classes, and can be re-stuck later to the level you like on your studio's floor. It is grip you can feel when you push into a releve, not a glue that pins you there, so class one is the stickiest it gets until you choose to re-stick it.
Choose the traction build unless the studio floor is already sticky. The non-traction build is for floors that already hold a sock. The Joule Shock has no traction layer at all; it is the choice for barefoot-friendly studios, not a grip sock.
Two things you could not know before: what the floor is like, and whether the studio's rule leaves room for the open sleeve. Our barre collection calls the Joule Shock its primary barre sock for practitioners who want open-toe barefoot feel; the AMP Shock leads here only because a first-timer does not yet know the rule or the floor. If the floor turned out to be carpet or already sticky, the non-traction AMP Shock build makes the quieter second pair. If you were allowed to go barefoot and wanted support anyway, reach for the Joule Shock next class. The collection's third pick, the half-sole Alpha Shock, keeps its traction to the forefoot for plie and passe work, and it is a pair to weigh once you know the floor.
One thing does not change: size by your shoe from the size chart. A compression sock is meant to fit snug, so pick your size from the chart rather than going up for comfort. The barre socks collection has the full lineup for the second decision.
Grip at the ball and the heel, graduated 20-30 mmHg, and Apolla's patented arch support, with a closed toe and heel.
Shop the AMP Shock
For barefoot-friendly studios. A sleeve that holds the arch and ankle at 20-30 mmHg, with patented arch support and no traction layer.
Shop the Joule ShockBoth Shocks are HSA/FSA eligible with no prescription required, so a benefits card can pay for the first pair, and both are made in the USA.
The AMP Shock's own product page calls it a go-to sock for barre class.
On the AMP Shock: arrives sticky, settles with wear, re-sticks to your level. The Joule Shock has none.
20-30 mmHg on both; graduated on the AMP Shock.
The AMP Shock and the Joule Shock both carry patented arch support, and both are Made in USA and HSA/FSA eligible.
Yes, when the booking email asks for them; if it allows bare feet, you can wait until you have felt the floor once. For a grip-sock studio, pack the AMP Shock with traction, a closed no-show that grips at the ball and heel. Size it by your street shoe from the size chart before you order.
Some are. Studios differ: some run barre barefoot or let you choose, and some ask for grip socks, so the booking email decides. Where the studio allows bare feet and you still want support, the Joule Shock is the pick: open at the toe and heel, so your skin is the grip, with 20-30 mmHg around the arch and ankle. If the rule is grip socks, that is the AMP Shock.
Sticky, and stickier than it will be later. The AMP Shock's grip sits at the forefoot and the heel, arrives at its grippiest, settles with wear, and can be re-stuck to the level you want after that. Think grip, not glue. Take the traction build; the non-traction one is for a floor that is already sticky.
You learn the floor and the rule, and both feed the second pair. Carpet or an already-sticky floor points to the non-traction AMP Shock build; a barefoot-friendly studio opens the Joule Shock sleeve. Either time, the size chart turns your street shoe size into a sock size, and the barre socks collection lines up every pick.
Choose the AMP Shock for your first barre class if the booking email asks for grip socks: a closed toe and heel, ball-and-heel traction, and graduated 20-30 mmHg compression with patented arch support. If your studio lets you go barefoot, the Joule Shock is the open-toe, open-heel sleeve with support around the arch. Size by your shoe.
Read the email, pack the AMP Shock if it says grip socks, and check the size chart once.