Frequently Asked Questions

Ordering

How do I know my order went through?
You will get a confirmation email within a few minutes with an order number starting SL-. If it has not arrived, check your spam folder before writing to us — that is where it is nine times out of ten.

Can I change or cancel an order?
Yes, if it has not shipped. Email store@stackline.com with your order number as soon as possible. Once a label is created we cannot recall the parcel, but you can return it free.

Do you offer gift wrapping?
Not yet. We do include a plain packing slip with no prices if you tick the gift option at checkout.

Sizing & fit

How does the apparel fit?
The Superhuman Hoodie is a relaxed unisex fit — size down if you want it close. The Signal Long Sleeve Tee is a regular unisex fit and true to size. Full measurements are on the Size Guide.

Will the hoodie shrink?
It is garment-washed before it is sewn, so expect under 2% shrinkage if you tumble dry low. Hang drying it removes even that.

Products

Does the 65W charger work outside the US?
Yes. It is 100–240V and ships with UK, EU and AU plug heads in the box.

Will the wireless pad charge through my case?
Through cases up to 3mm thick, yes. Not through cases with metal plates, magnetic wallets or card holders — remove those first.

Is the tumbler dishwasher safe?
The lid is, on the top rack. Hand wash the body — a dishwasher will eventually dull the powder coat.

Does the notebook paper handle fountain pens?
Yes. 120gsm ivory, no bleed-through and minimal ghosting with a medium nib.

Shipping & returns

How long does delivery take?
US Standard is 3–5 business days and free over $75. Full table on the Shipping & Returns page.

Do you ship internationally?
Yes, to most countries. Duties and import taxes are set by your country and payable on arrival.

What is your returns window?
Thirty days from delivery, free return shipping in the US, and no final-sale items.

Warranty & care

What does the warranty cover?
Manufacturing defects for two years on electronics and carry, one year on apparel and drinkware. Wear and tear is not covered, but spare parts are free for life.

Can I get a replacement buckle or tumbler lid?
Yes, free. Email us with your order number and what you need.

Wholesale

Do you do corporate orders?
Yes — 25 units and up, with optional co-branding and a four-week lead time. Write to wholesale@stackline.com.