Denaisii MagSafe Shoulder Strap Review: Snap On, Slide Off

This is the English edition of a review from my Japanese YouTube channel, iestaLife. I review gadgets from my home studio in Japan, so product links go to Amazon Japan.

Quick take

Denaisii’s shoulder strap attaches to your phone with MagSafe instead of hanging it from a fixed loop. Keep the phone snapped flat against your body while walking, then slide it off when you need it and use it freely at the end of the strap. That idea works better than I expected. The build is cheap and the magnet is exposed, so I would always use it with the included safety cord attached to reduce the risk of a drop.

iPhone held flat against the body by the Denaisii MagSafe shoulder strap — Snapped flat against my body when I’m not using it

What I tested

Denaisii MagSafe shoulder strap, 1,790 yen on Amazon Japan at the time of recording
An iPhone in a MagEasy Odyssey case with strong MagSafe magnets
The strap that came with the MagEasy case, for comparison — and as a sturdier strap to move the MagSafe puck onto

What I found

The MagSafe puck has no cover over its magnet — it appears to be glued on. Some Amazon reviews say the magnet comes off the puck, and this design makes that believable.
In the box: the strap with the MagSafe puck, a plate that sits between the phone and case with a loop for the safety cord, and two thin metal rings for phones without MagSafe. The rings are so soft they may bend if you ever peel one off.
The strap was very long out of the box. The length adjuster is weak, so it may slip over time.
With a strong MagSafe case, pulling the phone straight off is hard; sliding it sideways releases it easily.
The real win: short length while walking, full freedom when the phone is off the puck — tapping a transit card at a ticket gate no longer means fighting the strap.
I moved the puck onto the thicker MagEasy strap. A notch in the plate lets a chunky clip sit flush, and the phone still snaps on cleanly. It was easier to attach with the magnet facing outward.
Light shaking didn’t knock it off; hard shaking might. Detaching the whole strap is a two-step job because of the safety cord.

Sliding an iPhone off the Denaisii MagSafe strap — Slide sideways to release

Denaisii MagSafe puck moved onto the MagEasy shoulder strap — The puck also works on a sturdier strap

Who it’s for

People who can never find a strap length that is both comfortable and usable
Anyone who wants to try a MagSafe-style strap cheaply
Not for you if you take the strap off every time, or want something built to last

Watch the review

The video is in Japanese. Useful chapters: 01:02 unboxing, 04:13 using it, 07:21 moving it to another strap, 09:53 shake test.

Limitations

I tested one unit for a short time, so I can’t speak to long-term durability of the glued magnet. Results will depend on how strong your case’s MagSafe magnets are. Prices were Amazon Japan’s at the time of recording.

Products

Denaisii MagSafe shoulder strap: on Amazon Japan

MagEasy Odyssey + Strap M case (iPhone 17 Pro Max): on Amazon Japan

The Amazon Japan links above are affiliate links. As an Amazon Associate, I earn from qualifying purchases. Check the listing for the exact model, current price and shipping availability in your region.

More reviews in English