A guide to Underpatches

A guide to Underpatches

From our own personal experience of having two kids with Type 1 Diabetes,  we’ve often seen reactions to both the infusion set and the CGM. So when our friends at ExpressionMed came out with the Underpatch, we were excited to see what it could do.

Now it’s one of our best sellers at oneand2.com.au!

Here’s a run-down from ExpressionMed on what the Underpatch is for and how to wear it.


The ExpressionMed Underpatch was designed to help protect delicate skin from reactions to device adhesives siuch as the CGM on insulin pump. The information provided from ExpressionMed below explains more about how to best use the UnderPatch.

How do I apply the UnderPatch?

Put the UnderPatch on your skin where you would like to insert your CGM or pump. Then, insert your device through the patch and secure it with a patch tape. We have a wide vairety of tapes you can choose from here.

Click a link to view Expressionmed’s written or video application instructions.

Will any part of the UnderPatch go into my skin when inserting my device through it? 

No, the UnderPatch is designed with material that separates to let the needle pass through without any of the material being pushed into your skin.

Do I have to wear an overlay tape with the UnderPatch?

Since most devices are designed to adhere only to skin, it is recommended that the ExpressionMed UnderPatch should be paired with an overlay patch to ensure your device is secure.

Why doesn’t ExpressionMed’s UnderPatch have an opening for my device? 

The ExpressionMed UnderPatch was designed so you can insert the device through the patch. The material separates slightly from the force of the insertion needle to allow it to pass through without leaving any residue on the insertion needle or device. This gives you the best protection possible from your device’s adhesive.

Wearing an underpatch comes down to personal choice however if you experience frequent reactions to your pump or CGM, it might be a great option to consider.